class Solution {

public:

    // Encodes a URL to a shortened URL.

    string encode(string longUrl)

    {

        url.push_back(longUrl);

        return "http://tinyurl.com/" + to_string(url.size() - 1);

    }

    // Decodes a shortened URL to its original URL.

    string decode(string shortUrl)

    {

        auto pos = shortUrl.find_last_of("/");

        return url[stoi(shortUrl.substr(pos + 1))];

    }

private:

    vector<string> url;

};

// Your Solution object will be instantiated and called as such:

// Solution solution;

// solution.decode(solution.encode(url));